1
Loek J D Hont: Single loop transponder system and method. Texas Instruments Incorporated, Ira S Matsil, James C Kesterson, Richard L Donaldson, February 13, 1996: US05491483 (244 worldwide citation)

An apparatus including an object 10 associated with a contactless, electronic identifier is disclosed herein. In one example, the object 10 is a trash bin. This object 10 is formed from a non-conductive material. A single-loop antenna 14 is disposed adjacent the object 10. An impedance transformer 1 ...


2
Loek J D Hont: Identification system antenna with impedance transformer. Texas Instruments Incorporated, Ira S Matsil, James C Kesterson, Richard L Donaldson, April 29, 1997: US05625370 (113 worldwide citation)

The present invention discloses an electromagnetic device which includes a magnetic flux producing apparatus for producing a magnetic flux path loop. The magnetic flux producing apparatus preferably comprises a magnetic core 20 surrounded by electrical windings 22. A strip of electrically conductive ...


3
Loek J D Hont: Integrated air coil and capacitor and method of making the same. Texas Instruments Incorporated, Ira S Matsil, James C Kesterson, Richard L Donaldson, October 8, 1996: US05563582 (82 worldwide citation)

In one aspect, the present invention provides an integrated inductor and capacitor 20 which can be used as the inductive portion of a resonant circuit and the energy accumulator for a identification system transponder. In a first embodiment, the integrated inductor and capacitor component 20 may inc ...


4
Loek J D Hont: Air coil and method of making the same. Texas Instruments Incorporated, Ira S Matsil, James C Kesterson, Richard L Donaldson, January 7, 1997: US05592150 (82 worldwide citation)

In one aspect, the present invention provides an air coil 20. The air coil 20 may be made from a strip of electrically conductive material 22 which has an insulating material overlying it. For example, the conductive material may comprise copper. The strip 22 is wound into a coil to perform a plural ...


5
Loek J D Hont: Air Coil a security badge and a transponder. Texas Instruments Incorporated, Lawrence J Bassuk, Richard L Donaldson, February 2, 1999: US05867100 (80 worldwide citation)

In one aspect, the present invention provides an air coil 20. The air coil 20 may be made from a strip of electrically conductive material 22 which has an insulating material overlying it. For example, the conductive material may comprise copper. The strip 22 is wound into a coil to perform a plural ...


6
Bernard Barink, Gregory G Havlicek, Gary M Bishop, Loek J d Hont: Homodyne single mixer receiver and method therefor. Sirit Technologies, Haynes and Boone, April 3, 2007: US07199713 (16 worldwide citation)

An RFID circuit comprises an RF carrier signal source, a hybrid coupled to the RF carrier signal source operable to generate an in-phase and a quadrature phase component of the RF carrier signal, a switch coupled to the hybrid operable to pass one of the in-phase and quadrature phase components of t ...


7
Bernard Barink, Loek J d Hont: Homodyne RFID receiver and method. Sirit Technologies, Fish & Richardson P C, May 19, 2009: US07535360 (7 worldwide citation)

An RFID circuit comprises an RF carrier signal source, a hybrid coupled to the RF carrier signal source operable to generate an in-phase and a quadrature phase component of the RF carrier signal, a switch coupled to the hybrid operable to pass one of the in-phase and quadrature phase components of t ...


8
Loek J D Hont, Bernard Barink: Power control loop and LO generation method. Sirit Technologies, Fish & Richardson P C, June 9, 2009: US07546137 (6 worldwide citation)

A method for use in a RFID reader, the method comprising providing an output signal from an amplifier of a transmitter, attenuating the output signal via a step attenuator, detecting and comparing the attenuated output signal to a reference value, and adjusting power to the amplifier until the atten ...


9
Bernard Barink, Loek J d Hont: Homodyne RFID receiver and method. Sirit Technologies, Haynes and Boone, April 24, 2007: US07209040 (4 worldwide citation)

An RFID circuit comprising an RF carrier signal source, a hybrid coupled to the RF carrier signal source operable to generate first and second phase-shifted RF carrier signals, first and second mixers coupled to the hybrid each operable to multiply a respective one of the first and second carrier si ...


10
Bernard Barink, Loek J d Hont: Homodyne RFID receiver and method. Sirit Technologies, Fish & Richardson P C, April 29, 2008: US07366465 (3 worldwide citation)

An RFID circuit comprises an RF carrier signal source, and a hybrid coupled thereto operable to generate first, second and third phase-shifted RF carrier signals. The circuit further comprises first, second, and third mixers coupled to the hybrid each operable to multiply one of the first, second an ...